DE1710143A1 - Thread guard - Google Patents

Description

PATENT LAWYERS

DR. F. ZUMSTEIN - DR. E. ASSMANN DR. R. KOENIQSBERQER - DIPL-PHY8. R. HOLZBAUER

phone: ass4 7o and aai9ii

TELEGRAMS: ZUMPAT CHECK ACCOUNT: MÖNCHEN O1139

BANK ACCOUNT: BANK H. AUFHAUSER

a M D N OH E N S,

BRSUHAUSSTRASee 4 / ltt

8 / Sun

SC

RHöDXACESA

Paris, France

Thread monitor

The invention relates to a device for detecting a thread break or a thread monitor as it is used in particular in textile machines. Such a device is used for this. automatically come into operation when the _# or which rupture of her überwachten'Fäden and a suitable signaling or engagement "device trigger.

109143/0372

copy

1710U3

are thread guards known _B di © aas an Aehs® kippbsrsn H © bsl bsstah © n _B who is equipped with © in © ® Miller ₉ what? under the action of a force on the thread lies the hsbel, when this thread breaks, in a position 3urtickholt ₉ where the lever triggers a suitable device.Such thread monitors are simple, but not suitable for monitoring fine and weak Spated Pädens _s bai those who

in
des Heb © ls / der örössenordnuag von Graimn

and should advantageously be as low as possible. A Soleh © Sraft can only hooh sensitive larmeinrlchtungdn A trigger _e which thus weak or slightly damaged and expensive are "Auseerdem the response time of such thread monitor long and the response itself even uncertain as even a small force can interfere with the lever movement.

In order to get rid of these Haohteile, thread guards were created built in which the lever during the thread breakage given power through the intervention of a far stronger one Rüokholkraft is reinforced, which on the Hebsl in the course its rocking movement is transmitted into the alarm position. This lever can therefore only be simplified to © ine © Alarm device work safely and without interference.

109843/0372

BAO ORIGINAL

Me various known embodiments eind not free of, roll _β Thus, the use of strained springs are relaxed during the lever movement to. Saeohani, who are weak and susceptible to trouble, see facilities and make it difficult to reset or tension the Eadenwäohters after each release process. The usage. from magnetic force led to devices in which the re-setting or loading of the thread monitor is greatly simplified. Sartlber addition, the adjustment of the BUokholkraft the thread monitor on the yarn, which is often carried out by slipway of the device, too inaccurate and leads sä a very fault-prone operation of the textile machines _p which such devices are equipped with a large number "and a very low utilization (the annex »^ j

The present invention aims at a thread monitor of high sensitivity and at the same time reliable function as well as a thread monitor, its Rüokholkraft Easily adjustable against the thread or easily overcome is maintained although only a small value is maintained will.

1098 ^ 3/0372

BADORfGlNAL

j., ^. i ^ iSEä

1710U3 - 4 -

According to the invention, this is achieved by a Padenwäohter with a lever, which is equipped with a sensor and mounted on a rotation axis, as well as at least "between a display position and an alarm position can be tilted, the lever in the display control under the action of a first Rüakholfceaft in Direction to the Aleirrastellung with ftea IPadon 5m bar contact is and a magnetic device submits this lever aor sswide Rüokihollcraft in the direction of the alarm position "which has a magnetic force and can be adjusted in the display position, but ₉ outweighs when the lever tilts from this display to the alarm position" the lever has at least one position of equilibrium which is away from the display and alarm position and beyond which the magnetic force exceeds.

The Hobøl of Padenwächtere can be aohwenlxt about an axis, and it may have a Anaeigestellung, hl which it communicates with the monitoring at the yarn into contact "an alarm position" in which it can actuate a suitable Alarneinrichtung, and at least assume a Crleiehgev / ichtsstelluBg "the lies between the two preceding positions, and in which he is not subject to any force which would turn him in one way or the other

1098 ^ 3/0372

1710U3

- Want to tilt 5 direction.

According to the combination of these two return forces

the thread monitor can be one or more neighboring

Gleiohgewiohtastellungen or a Gleiohgewiohtszone

exhibit. Preferably the distance between the different balance weights or the length ' m the Qleichgewiohtozone is reduced so that the Reaktlons- % since the thread monitor becomes as short as possible, and for the sake of simplicity, one does not become "honored" in this case ▼ talk about a position of equilibrium. You equal— preferred position is preferably near the rise * » position, being on the opposite side of the thread path comes to rest »in such a way that the lever the equilibrium position normally only then » sufficient if there is no thread or the jade is torn ^

let. -

The magnetic force or wide return force is preferably in the display position vernöohläeeigbax, 00 that in this position the lever is only exposed to the first force on the axis of rotation the - apart from the magnetic force - forces acting on it is orthogonal resultant. This first

109843/0372

. BAOORtGtNAL

1710H3

Rticltholkraft can thus be composed of force-coiipoiients, which are brought about by one or a combination of devices known per se, for example by lever weights, devices based on magnetic repulsion, springs, counterweights, gas jets, etc., as well as by means of friction. forces, success forces, aerodynamic forces and the like. In practice, the latter group of forces will advantageously be disregarded due to the generally known devices.

The magnetic force or “far return force” surpasses beyond the equilibrium position, the first return force, i.e. that on the axis of rotation of all other forces, to which the lever is exposed, orthogonal component

From. from the vicinity of the display position, the first Rüokholkraft preferably decreases up to the equilibrium position. This decrease enables the lever to be swiveled back quickly into the display position if it should have moved out of this position due to vibrations of the thread or the hashine

109843/0372 8AO ORIGINAL

1710U3

-. 7 · ■

Eier AttS0issoat9JL3 nng and the equilibrium position simply depends on the ßx'Bsgo of the first return force la the Anseigestollamg · So the position of equilibrium can be easily visualized »wex? z * no thread is present, the lever in this position no longer questions "Bemit identify the Binaiel- A development Deio Fadenwäohtera easily überwaoht wide. M.

Between the GIe .ioli eat position and in the Pail ", where there are several positions "" wipe the last balance weighting, that of the lever during o a tilting movement in the direction of the Jilarmetstellung is paired, and the alarm position wins the magnet " krait or sweite return force prevails over dia first return force and the lever will act on this

The alarm position accelerates very vigorously, in which he ™

with the force he has applied, a suitable ™

Alarm device can trigger «You alarm device can be triggered directly by the lever · This int for example to a bell system »a signal * * disk etc. the case »It can also be through a Relays are triggered »daa again by the fcu-bel is operated · This relay can be a mechanical », be electric or pneumatic relay *

109843/0372

Ί710Η3

An example embodiment of the present invention Invention is described with reference to the drawing «in

Pig, Fig. 1 is a view of a device according to the invention Thread monitor represents »

FIG. 2 shows the same device as that of FIG Page.

The device has a lever 1 which can rotate freely on a horizontal axis 3 through the ball bearing 2 "which is attached to the bearing 4" which is itself connected to the machine stand (not shown) End-mounted sensor 5 normally in contact with the thread 6 under the action of a force which is adjusted with a counterweight 7 which can be arranged in various positions around a screw δ. A magnetic device consists of white magnetic plates 9 and 10, which are operated with the lever 1b 'w. are connected to the carrier 4 and arranged in such a way that they come to lie on top of each other through the tilting movement of the lever 1 »whereby they attract each other»

109843/0372 BASE ORIGINAL

1710U3

and the evoked magnetic force is negligible is when aioh the lever is near the display position is located. The lever 1 is also provided with a stop 12, which has a not shown Alarm circuit arranged electrical contact 11 sohlieast, when the lever tilts to the alarm position.

When the thread 6 travels, the lever 1 tilts due to that Counterweights and nimat at speed su while the moment the weight is decreasing. The latter cancels itself out and grows in the most opposite sense, i. H. it is the magnetic attraction of the platelet 9 and Io opposite. However, one thing grows absolute value the moaent of the magnetic force faster than the moaent of the weight as lever, so, daaa an equilibrium point is reached «, Beyond that the magnetic force predominates. The lever passes the equilibrium point due to the speed reached, and it is then accelerated again τοη, until he has reached the Alaroatellation »in dar ar dan Contact 11 closes.

The device described enables adjustment the Rüokholkraft of the lever in dar Inseigostelltmg τοη ο to Io g and monitoring by standing still dee

109843/0372

1710U3

-Io -

Lever in the GXoioiigewichtsatolltmg enables a Accuracy up to 0.1 g for cases uiit higher Sensitivity. The Magneteinrlohtung allows the setting of a game at the end of the Hebelveges, whereby one obtains a force in the order of magnitude of loo g » and the electrical contact 11 and practically every other Known alarms in the device operated very reliably can be.

109843/0372

; OK Cf «AD ORIGINAL

Claims (1)

Claim , characterized by a lever that with a feeler auagerU. jtet and on an axis of rotation attached and can be tilted at least between a standing position and an alanist position » the lever in the Ansιige position under the in the direction of the effect of an erute back ')! old the thread Iv, contact is, and a Hagneteinriohtung this plane of a second Rüokholkraft in Direction towards the position of warmth subdues »one Magnetic force in the OK position, but transferred when the lever is released from this To »eige- but HaraetelluM ,? tilts, taking the lever At least one has a liability »the ■ knowledge of the anaeige- and hara position is on beyond which the Kagnetki.'aft predominates 109843/0372 BAD OFFICIAL Blank page